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s. 0. HENDRIOKSON TELEGRAPH INSULATOR.

No. 64,315. Patented Apr. 30, 1867.

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STEPHEN (l. HENDRIUKSON, OF NEW YORK, N. Y.

7 Letters Patent No. 64,315, (Int/2 7 April 3 186i; I'INf Jdlml .-1 pm! 24, T867.

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TO ALL WHOM IT MAY CONCEBN:

Be it known that I, STEPHEN G. HENDltIUKSON, of the city of New York, in the county and State of New York, have inventeda new and improved Drip Insulator for Telegraph Wires; and I do hereby declare that the following is a. full and exact description of the same, reference being had to the accompanying drawings, which form a part of this specification, and to the letters of reference marked thereon.

The nature of my invention consists in construetingnnd arranging upon a telegraph wire an instrument of shelter from rain, by which a certainportion of the wire may be kept dry, and thus the current of electricity, which has a tendency to follow the water ou the'outside offt'hc wire over other insulators into the posts and other connections, and so into the ground, maybe checked and prevented from escaping.

I will proceed to describe in'detail-the construction and application of my invention as applied to a wireentering a building. In the saidnecoinpanying drawings- Figure 1 an elevation of thejusulator, and a part of the wall of a. building. Figure 2 is a vertical section of the insulator.

Figure 3 is a transverse sectionofi the line cf, fig. 2.

Figure 4 is a like section on the line e Z), fig. 2.

Figure Sis also a transverse section on the line a (Z, fig.

Figure (3 is a perspective view of the insulator complete and Figure 7 is a perspective view oi the perforated trunk of the insulator.

Similar letters of reference indicate like parts in all the drawings.

In fig. 1, the wire A 13 is represented entering a building through the wall E D, the end A being on the exterior, and ll on the interior of the building. It usual in such cases to make an insulator 'by covering the wire with gutta percha simply, and this works very well in dry weather, but in wet weather the current of electricity follows the water down on the outside of the gutta percha from A to C, and thence, by means of a connection made with the wall by the water at that point, discharges or. escapes into the wall E D. To break this connection, and so prevent the current from takiiig that course, all that is necessary is to interpose a dry spot, of an inch or so in length, extending all around the gutta percha betwecuA and C. To etl'ect this I conrenstruet the drip insulator A F as follows: Upon the gntta-pereha covering above referred to I place the wooden trunk-piece G, fig. 2, perforated through the centre to slip tightly over the gutta percha, and the perforation widened and enlarged at the bottom H so as to leave it clear space. between the trunk G and the gntta perchal, all around the latter at that place, as shown. I At the top, J, of said trunl-z-pieceImake several indentures in the head of the same, and fill in the angle made bythe trunk-piece with the gutta-percha covering above the former with softened gutta percha, which sinks into the said indentures and adheres to the covering of the wire and the woodenvhcad of the trunk-piece, so as to lead the water from the wire A down over the outside of the trunk-piece G. I propose in some cases to use the said trunk-piece G alone as a. drip insulator, in which case the water will descend down the outside of it and drip off at K, leaving the gutta-pereha covering on the interior of the trunk-piece from A to K dry, thus affording a barrier to the course of the current of electricity from the wet wire above to the wetcovering below the insulator. In other cases, for greater security and certainty in effecting this object, I construct the bell-drip M, fig. 2, ofthe form shown, and of iron or other metal coated with tin or other covering suitable to prevent the same from corroding, and also japanned or painted and fitted tightly to the trunk-piece G, so as to slip up on the same closely under the sharp projecting edge of the head J of the said trunl -piece, and fitted so tightly at that point and upon the body of the said trunk-piece as to be proof against the entrance of the water between the bell and the trunk-piece. By means of this hell the water is carried dovrn on the outside of the same to drip at N, thus alTording a greater certainty of keeping dry the gutta-percha covering enclosed by the said bell. And again, in some cases, I propose for still greater security to construct and apply the inverted hell 0, fig. 2, made in asiiuilar manner to the bell M,

and as shown, fitting tightly to the trunk-piece P, closed with gutta percha at Q, and leaving an annular space between it and the hell M at It. This invcrtedhell is for the purpose of preventing any spray from driving up from beneath. In many places where the wires do not enter a building, but where they are subject to the same danger of having th irrcnt of electricity diverted away, as at the telograplrpolcs. &c., I proposcto use one such insulator on the wire on each side of the pole, thus breaking the connection otherwise made by the water on the outside of the wire. I construct the trunk-piece G of any hard and durable wood, preferring lignumvitae or locust. v

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is as follows: I

1. I claim a. drip insulator arranged in'connection with gutt-a-perchn coverings of telegraph wires, substantially ms rleecribeil and for the purpose set forth.

,2. claim th'etrunkpiece G, the bell M, the inverted bell O, the trunk-piece I, and the guttn-percha connections at J and Q. constructed substantially as and for the purpose described. I i

S. C. HENDRICKSON. TL. 5,]

Witnesses:

J. E. WARE, O. I. HATFIELD. 

